.test-nav {
    display: flex;
    width: 100%;
    height: 50px;
    background-color: #000;
    color: white;
    justify-content: space-between;
    box-sizing: border-box;
    padding: 0 20px;
}

.test-nav .test-header {
    line-height: 50px;
    font-size: 26px;
}

.test-nav .test-list {
    line-height: 20px;
}

.test-nav .test-list li {
    list-style: none;
    float: left;
    margin-left: 10px;
}